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Cheap flights from San Juan to London from £230

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Juan to London departing on 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
13:14 - 06:50
SJU
-
LHR
13h 36m
1 stop
KLM Logo
11:45 - 11:46
LHR
-
SJU
28h 01m
2 stops
£416KLM
Tue, 17 Mar - Wed, 25 Mar
United Airlines Logo
15:46 - 07:30
SJU
-
LHR
35h 44m
1 stop
United Airlines Logo
06:50 - 21:22
LHR
-
SJU
18h 32m
2 stops
£423United Airlines
Tue, 3 Mar - Tue, 10 Mar
United Airlines Logo
15:46 - 05:55
SJU
-
LHR
34h 09m
2 stops
United Airlines Logo
06:50 - 21:22
LHR
-
SJU
18h 32m
2 stops
£426United Airlines
Tue, 3 Mar - Tue, 10 Mar
United Airlines Logo
02:05 - 21:20
SJU
-
LHR
15h 15m
1 stop
United Airlines Logo
09:30 - 23:36
LHR
-
SJU
18h 06m
2 stops
£431United Airlines
Tue, 3 Mar - Wed, 11 Mar
Multiple Airlines Logo
11:22 - 10:55
SJU
-
LGW
19h 33m
2 stops
Multiple Airlines Logo
11:55 - 19:06
LGW
-
SJU
35h 11m
2 stops
£445Multiple Airlines
Tue, 3 Mar - Tue, 10 Mar
Multiple Airlines Logo
01:21 - 06:20
SJU
-
LGW
23h 59m
1 stop
Multiple Airlines Logo
13:05 - 10:26
LGW
-
SJU
26h 21m
1 stop
£460Multiple Airlines
Thu, 30 Apr - Fri, 8 May
Iberia Logo
21:25 - 19:00
SJU
-
LGW
17h 35m
1 stop
Iberia Logo
11:45 - 19:55
LGW
-
SJU
12h 10m
1 stop
£554Iberia
Wed, 18 Feb - Thu, 26 Feb
British Airways Logo
21:25 - 14:05
SJU
-
LCY
12h 40m
1 stop
British Airways Logo
09:10 - 19:55
LCY
-
SJU
14h 45m
1 stop
£663British Airways
Tue, 24 Feb - Tue, 3 Mar
Iberia Logo
20:40 - 08:35
SJU
-
LCY
30h 55m
1 stop
Iberia Logo
19:15 - 15:55
LCY
-
SJU
25h 40m
1 stop
£768Iberia
Tue, 5 May - Mon, 11 May
British Airways Logo
21:25 - 14:05
SJU
-
LCY
12h 40m
1 stop
British Airways Logo
07:50 - 16:40
LCY
-
SJU
12h 50m
1 stop
£774British Airways
Wed, 18 Feb - Fri, 27 Feb

JetBlue flights from San Juan to London

Our best JetBlue deals on San Juan to London flight tickets
JetBlue
18 Feb
SJU05:15San Juan Luis Munoz Marin Intl
12h 25m
1 stop
LHR21:40London Heathrow
27 Feb
LHR09:20London Heathrow
16h 43m
1 stop
SJU22:03San Juan Luis Munoz Marin Intl
£444
JetBlue
17 Feb
SJU11:00San Juan Luis Munoz Marin Intl
15h 55m
1 stop
LHR06:55London Heathrow
2 Mar
LHR12:20London Heathrow
19h 31m
1 stop
SJU03:51San Juan Luis Munoz Marin Intl
£460
JetBlue
18 Feb
SJU14:45San Juan Luis Munoz Marin Intl
12h 10m
1 stop
LHR06:55London Heathrow
27 Feb
LHR08:05London Heathrow
20h 24m
1 stop
SJU00:29San Juan Luis Munoz Marin Intl
£478

Delta flights from San Juan to London

Our best Delta deals on San Juan to London flight tickets
Delta
2 Mar
SJU14:24San Juan Luis Munoz Marin Intl
12h 26m
1 stop
LHR06:50London Heathrow
10 Mar
LHR20:00London Heathrow
24h 18m
2 stops
SJU16:18San Juan Luis Munoz Marin Intl
£452
Delta
31 Mar
SJU14:07San Juan Luis Munoz Marin Intl
18h 08m
2 stops
LHR13:15London Heathrow
7 Apr
LHR20:05London Heathrow
25h 13m
2 stops
SJU16:18San Juan Luis Munoz Marin Intl
£463
Delta
31 Mar
SJU13:14San Juan Luis Munoz Marin Intl
12h 31m
1 stop
LHR06:45London Heathrow
7 Apr
LHR20:05London Heathrow
25h 13m
2 stops
SJU16:18San Juan Luis Munoz Marin Intl
£465

momondo Fare Finder

 
Customise your flight search to find flights from San Juan to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 4 February 2026.
Use the filters below to find and compare flights from San Juan to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/3

13:14-06:50

1 stop13h 36m

London Heathrow

Wed 25/3

11:45-11:46

2 stops28h 01m

£416

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/3

15:46-07:30

1 stop35h 44m

London Heathrow

Tue 10/3

06:50-21:22

2 stops18h 32m

£423

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/3

15:46-05:55

2 stops34h 09m

London Heathrow

Tue 10/3

06:50-21:22

2 stops18h 32m

£426

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/3

02:05-21:20

1 stop15h 15m

London Heathrow

Wed 11/3

09:30-23:36

2 stops18h 06m

£431

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Tue 3/3

11:22-10:55

2 stops19h 33m

London Gatwick

Tue 10/3

11:55-19:06

2 stops35h 11m

£445

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Thu 30/4

01:21-06:20

1 stop23h 59m

London Gatwick

Fri 8/5

13:05-10:26

1 stop26h 21m

£460

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Wed 18/2

21:25-19:00

1 stop17h 35m

London Gatwick

Thu 26/2

11:45-19:55

1 stop12h 10m

£554

San JuanLondon

SJU - LCY

SJULCY

San Juan Luis Munoz Marin Intl

Tue 24/2

21:25-14:05

1 stop12h 40m

London City

Tue 3/3

09:10-19:55

1 stop14h 45m

£663

San JuanLondon

SJU - LCY

SJULCY

San Juan Luis Munoz Marin Intl

Tue 5/5

20:40-08:35

1 stop30h 55m

London City

Mon 11/5

19:15-15:55

1 stop25h 40m

£768

San JuanLondon

SJU - LCY

SJULCY

San Juan Luis Munoz Marin Intl

Wed 18/2

21:25-14:05

1 stop12h 40m

London City

Fri 27/2

07:50-16:40

1 stop12h 50m

£774

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between San Juan and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in February. Flight prices, which tend to average around £427, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from San Juan averaging around £457.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £609 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £517 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from San Juan to London takes 12h 25m
There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.
Search flight deals

  • How far is San Juan to London by plane?

    San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 12h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from San Juan to London?

    Prices for flights from San Juan to London refresh daily.

  • How old do you have to be to fly from San Juan to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Dover
Folkestone
Bedford
Colchester
Wembley
Worthing
Ramsgate

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport